CN103839511B - Light-emitting device and driving method on light emitting diode - Google Patents
Light-emitting device and driving method on light emitting diode Download PDFInfo
- Publication number
- CN103839511B CN103839511B CN201210475615.0A CN201210475615A CN103839511B CN 103839511 B CN103839511 B CN 103839511B CN 201210475615 A CN201210475615 A CN 201210475615A CN 103839511 B CN103839511 B CN 103839511B
- Authority
- CN
- China
- Prior art keywords
- light
- emitting diode
- tube core
- emitting device
- led
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Led Devices (AREA)
- Led Device Packages (AREA)
Abstract
The present invention discloses a kind of light-emitting device and driving method on light emitting diode.Light-emitting device includes, an at least blue light-emitting diode tube core, at least a red light-emitting diode tube core and an electric connection structure.Blue light-emitting diode tube core can send the first light.Red light-emitting diode tube core, which is set, can send second of light.Electric connection structure is electrically connected blue light-emitting diode tube core and red light-emitting diode tube core, and it is shone.When blueness shines with red light-emitting diode tube core, blue light-emitting diode tube core and red light-emitting diode tube core consume one first electrical power W respectivelyBAnd one second electrical power WR, and the correlated colour temperature of light-emitting device is TNAbsolute temperature.Power ratio RWFor the first electrical power WBTo the second electrical power WRRatio.Power ratio RWRange approximately from 7.67*ln (TN) -56.6 arrive 5.01*ln (TN) between -37.2.
Description
Technical field
The present invention relates to light emitting diode, more particularly, to using light emitting diode, can produce high color rendering index
Light-emitting device and relevant driving method.
Background technology
Light emitting diode (light emitting diodes, LEDs) is a kind of light-emitting device using semiconductor as material.
Because LED has the advantages that high life, power saving, light and handy in itself, LED gradually substitute seem osram lamp etc. some tradition hairs
Electro-optical device.The light color that LED is sent is often depending on used semi-conducting material during manufacture.
Semi-conducting material is three-five alloy used by some LED, seems gallium nitride (galliumnitride, GaN).
The process of LED is manufactured, these alloys are usually deposited on carborundum (silicon in layer in a manner of extension
Carbide) in substrate or sapphire (sapphire) substrate.And these alloys can have p-type or N-shaped doping to adjust it
Electrical speciality.The light that LED based on GaN is sent, its color, spectrally is about in ultraviolet (UV) or indigo plant
Near color.
For the use illuminated, layer of fluorescent powder can be covered on LED to reach this purpose.Fluorescent powder is a kind of light
The material of photoluminescence, then it with a part of electromagnetic wave of certain in absorption spectrum, can be emitted in the electromagnetism of another part in spectrum
Ripple.Therefore, when covering layer of fluorescent powder on LED, the light and fluorescent powder that are not absorbed in LED by phosphor powder layer are sent out
After the light gone out mutually mixes, so that it may produce desirable color and brightness.
It is the blue-ray LED using InGaN as luminescent layer by taking white light as an example, used by white light LEDs, and is applied on this blue-ray LED
Fluorescent powder is furnished with, its some blue light that can be sent blue-ray LED, is converted into yellow light or green-yellow light.When this white light LEDs quilt
During power supply, the semiconductor in blue-ray LED can convert electrical energy into and launch blue light (or UV light), and which part will be by fluorescent powder
Absorb and be converted into green-yellow light (or yellow light).Because yellow light or green-yellow light are about the complementary colours of blue light, human eye is sentenced
The entire combination of fixed this yellow light and blue light is white light.White light source has several characteristics to need to consider, seems correlated colour temperature
(correlated color temperature, CCT) and colour index (color rendering index, CRI) etc. is drilled,
All it is that the white light sent for describing this white light source has more close to the white light of nature.
Colour temperature is represented with Degree Kelvin (° K), represents the color combination that an ideal black-body is sent in that temperature.One
As for spectrum, osram lamp is very close to ideal black-body.When osram lamp is heated to 2000 ° of K, red light can be sent.
As temperature raises, can gradually turn orange red, yellow.It is generally white during to 5000 ° of K.To during 8000 ° of K for blueness.Simply
Say, temperature is higher, and blue component is more；Temperature is lower, and red component is more.Because the spatial distribution of many artificial light sources
The spatial distribution of ideal black-body is not same as, so often representing its colour temperature using correlated colour temperature CCT.An if artificial light sources
Color of the color combination sent close to ideal black-body in color temperature combines, and the CCT of this artificial light sources is defined as the colour temperature.
There are several methods can be from the position on chromaticity coordinates (Chromaticity Coordinates), to derive a white light
CCT.Although method is different, the CCT differences derived are not too large.
Definition general CRI is performance results of 8 kinds of selected colors under the irradiation of that white light source.One white light source
CRI peaks are 100, represent that 8 kinds of colors completely are reproduced out.Lower CRI, represents in 8 kinds of colors, in that white light
Under the irradiation in source, there is bigger deviation.The definition of some CRI is to employ 14 kinds of selected colors.In this description, CRI
Definition refers to result caused by the above or any similar definition.
Current white light LEDs more well known are to use center emission wavelength (peak-
Emissionwavelength) be about 440nm to 480nm blue light diode and be commonly called as YAG fluorescent powder (consisting of
Cerium doped yttrium aluminum) combination.The blue light of part can be converted into green-yellow light by YAG fluorescent powder.People
When arriving the combination light of blue light and green-yellow light soon, it will be considered that it is white light.
At present, desirable CRI and CCT are extremely difficult to using the white light LEDs of YAG fluorescent powder or similar fluorescent powder.Cause
The light sent by this white light LEDs, spectrally, often only two peak values, it is attached with green-yellow light nearby to respectively fall in blue light
Closely, CRI and the required low wavelength red light portions of CCT will be adjusted by being short of.So the CCT of such white light LEDs is difficult to drop to
5000 ° of below K, CRI are often below 75.
A kind of CCT that can drag down white light LEDs and the method for increasing its CRI, are the components for changing fluorescent powder.Citing comes
Say, phosphor powder layer uses two or more fluorescent powders：One kind is YAG fluorescent powder, and for producing green-yellow light, another fluorescent powder is special
Door is used for producing feux rouges.Such white light LEDs are spectrally, it is possible to can be in the frequency near blue light, green-yellow light and feux rouges
Respectively produce a peak value.As long as adjust the ratio and size of peak value, it is possible to desirable CCT and CRI can be obtained.But
The energy conversion efficiency of the fluorescent powder of generation feux rouges is simultaneously bad, can reduce the luminous efficiency of whole white light LEDs.
The content of the invention
To solve the above problems, the present invention provides a kind of light-emitting device, it includes a, at least blue light-emitting diode pipe
Core, at least a red light-emitting diode tube core and an electric connection structure.Blue light-emitting diode tube core can send the first
Light.Red light-emitting diode tube core can send second of light.Electric connection structure to be electrically connected blue light-emitting diode tube core with
And red light-emitting diode tube core, and it is shone.When blue light and the red light-emitting diode tube core shine, blue light emitting two
Pole pipe tube core and red light-emitting diode tube core consume one first electrical power W respectivelyBAnd one second electrical power WR, and shine
The correlated colour temperature of device is TNAbsolute temperature.Power ratio RWFor the first electrical power WBTo the second electrical power WRRatio.Power ratio RW
Range approximately from 7.67*ln (TN) -56.6 arrive 5.01*ln (TN) between -37.2.
Brief description of the drawings
The white light LEDs that Fig. 1 is implemented for the present invention；
Fig. 2 is the equivalent circuit diagram of the white light LEDs of Fig. 1；
Fig. 3 is the section schematic diagram of the white light LEDs of Fig. 1；
Fig. 4 is the schematic diagram of a LED core；
Fig. 5 is the correlated colour temperature T of the white light LEDs of Fig. 1NWith power ratio RWRelation；
Fig. 6 is the schematic diagram of an alternative embodiment of the invention；
Fig. 7 is the schematic diagram that blue light-emitting diode tube core is arranged at different planes from red light-emitting diode tube core；
Fig. 8 is the schematic diagram that white light LEDs have multiple optical lenses.
Main element symbol description
10 white light LEDs
12 package substrates
13 grooves
14 electronic components
15 reflection layers
18 resins
20 blue light-emitting diode tube cores（Diode crystal particle）
22 red light-emitting diode tube cores
24 phosphor powder layers
26 bonding wires
28 adhesive cushions
29 metal wires
31 rectifiers
32a ~ 32d LED cores
34 filter capacitors
36 current-limiting resistances
37 bonding wires
38 adhesive cushions
39 conductor wires
40 LED cores
42 substrates
44 LED units
46 conducting wires
48 adhesive cushions
50 luminous junctions
60th, 61,62 curve
64 hatched example areas
66th, 68 constant current
70 blue light-emitting diode units
72 red light-emitting diode units
Embodiment
The white light LEDs 10 that Fig. 1 displays are implemented according to the present invention.White light LEDs 10 can be a COB (circuit-on-
Board) encapsulate, it includes have 12, one rectifier of a package substrate (submount), 31, four LED core 32a ~
32d, a filter capacitor 34, a current-limiting resistance 36, adhesive cushion (bonding pad) 38 and electric connection structure.Electric connection structure
It is made of the conductor wire (conductive strips) 39 on package substrate 12 with bonding wire (bonding wire) 37.Fig. 2 is shown
The equivalent circuit diagram of the white light LEDs 10 of diagram 1.
High pressure alternating current (for example 110ACV or 120ACV) AC of exchange, can be defeated from the adhesive cushion 38 on package substrate 12
Enter, there is provided the electric energy of white light LEDs 10.Rectifier 31 can be a bridge rectifier (bridge rectifier), be adhered to envelope
Fill on substrate 12, can be used for the high pressure alternating current AC of exchange, be converted into DC power supply.36 controllable flow of current-limiting resistance is through white light
The magnitude of current of LED 10.Filter capacitor 34 can be used to stablize the cross-pressure of two output terminals of rectifier 31, to provide stable voltage
To LED core.LED core 32a ~ 32d is arranged on package substrate 12, and is made using a bonding wire 37 connection
For LED core 32a ~ 32d into a cascaded structure, the electric current for flowing through each LED core is the same.Luminous two
Pole pipe tube core 32a ~ 32d at least one is red light-emitting diode tube core, remaining is blue light-emitting diode tube core.By being electrically connected
Binding structure, the DC power supply on filter capacitor 34, which can provide electric current, allows LED core 32a ~ 32d to shine.
Fig. 3 citings show the section schematic diagram of the white light LEDs 10 of Fig. 1.Package substrate 12 can one have good heat conductive
The ceramic substrate of coefficient, its technology can by thick film manufacture craft (thick film), low temperature co-fired manufacture craft (LTCC) with it is thin
The modes such as film production technique are made.It could be formed with package substrate 12 with plate making or lithographic fabrication process institute shape
Into metal wire (metal strip) 29.In the present embodiment, in the groove 13 on package substrate 12, it placed a blue light
20 and one red light-emitting diode tube core 22 of LED core.In this embodiment, blue light-emitting diode tube core is
A kind of light emitting diode, can send the first light, its center emission wavelength is approximately between 430nm to 480nm；Red light-emitting
Diode chip is another light emitting diode, can send second of light, its center emission wavelength is approximately at 600nm and arrives
Between 660nm.Blue light-emitting diode tube core 20 is equipped with a phosphor powder layer 24, it can be by the institute of blue light-emitting diode tube core 20
The first light sent, such as blue light or UV, excite and send the third light, such as yellow light or green-yellow light (its center
Emission wavelength is approximately between 540nm to 590nm).In the fig. 3 embodiment, phosphor powder layer 24 is not formed in feux rouges
On LED core 22.Transparent or semitransparent resin 18 is by two pole of blue light-emitting diode tube core 20 and red light-emitting
Pipe tube core 22 is enclosed in groove 13.Resin 18 can also be used as an optical lens, to control the emergent light angle of white light LEDs.
In another embodiment, fluorescent powder can be substantially evenly distributed in resin 18, while be covered in blue light-emitting diode tube core
20 and red light-emitting diode tube core 22 on.One reflection layer 15 is formed on groove 13, it can reflect blue light emitting two
The light that pole pipe tube core 20 and red light-emitting diode tube core 22 are sent toward 15 direction of reflection layer, and then increase toward resin
The brightness of illumination in 18 directions.Blue light-emitting diode tube core 20 and red light-emitting diode tube core 22 gold or the bonding wire of copper
(bonding wire) 26 is connected.Bonding wire 26 also provides blue light-emitting diode tube core 20 and red light-emitting diode tube core
The electrical connection of metal wire 29 on 22 to package substrate 12.Electronic component 14, can be a rectifier, a resistance or a capacitance
Deng being arranged on two metal wires 29.Some metal wires 29 can be used as an adhesive cushion 28, the input as high pressure alternating current AC.
Fig. 4 citings show a LED core 40, its can be LED core 32a ~ 32d in Fig. 1 its
One of.Substrate (substrate) 42 can be a sapphire substrates, have thereon formed with semiconductor fabrication process it is several
LED unit 44, conducting wire 46 and adhesive cushion 48.LED unit 44 can line up an array in substrate 42, send about the same
The light of spectrum.Each LED unit 44 has a luminous junction 50, its semi-conducting material can determine shining for LED unit 44
Color.For example, AlGaInP is suitable for a red-light LED unit, and InGa1N is suitable for a dark green, blue, purple and ultraviolet light
LED unit.LED unit 44 is cascaded by conducting wire 46, and LED unit 44 also is electrically connected to adhesive cushion 48.
Fig. 5 shows the correlated colour temperature T of the white light LEDs 10 of Fig. 1NWith power ratio RWRelation, wherein TNWith absolute thermometer
Show.In this description, power ratio RWMean in a white light LEDs, the electrical power that all blue light-emitting diode tube cores are consumed
(it is assumed that WB), the electrical power consumed to all red light-emitting diode tube cores is (it is assumed that WR) ratio, i.e. RW=WB/WR.
In Fig. 5, curve 60 (star-like), 61 (diamond shapes) and 62 (square) are the measurement knots for the three kinds of white light LEDs implemented according to the present invention
Fruit.In the present embodiment, blue light luminous efficiency EFB, for the per unit electrical power of blue light-emitting diode consumption, produced blue light
Luminous flux；White-light emitting efficiency EFW, for the per unit electrical power of blue light-emitting diode consumption, caused blue light (first
Kind of light) and phosphor powder layer produce green-yellow light (the third light), the luminous flux after mixing；Red light-emitting efficiency EFR, sent out for feux rouges
The per unit electrical power that optical diode is consumed, the luminous flux of produced feux rouges (second of light).Luminous efficiency ratio is defined as, in vain
Light luminous efficiency EFWTo red light-emitting efficiency EFRRatio.Luminous efficiency ratio (the EF measured in Figure 5W/EFR), it is respectively
0.8 (curve 60), 1 (curve 61) and 1.2 (curves 62).Curve 60 is expressed as RW=7.67*ln(TN)-56.6；Curve 62 is then
Represent RW=5.01*ln(TN)-37.2.Hatched example areas 64 is located between curve 60 and 62.According to correlated colour temperature (or the work(wished to get
Rate compares RW), utilize curve 61,62,63 so that the power ratio R of white light LEDs 10W(or correlated colour temperature TN) hatched example areas 64 is fallen into,
The CRI of white light LEDs 10 also can reach more than 85 at the same time.
When a lighting system needs to reach a correlated colour temperature, Fig. 5 can determine blue light-emitting diode in a white light LEDs
The quantity of tube core and red light-emitting diode tube core.For example, it is assumed that each blue light-emitting diode tube core has 12 bluenesss
LED unit, the forward operation voltage V of each blue LED unitsFAbout 3.1 volts, each red light-emitting diode tube core has
6 red LED units, the forward operation voltage V of each red LED unitsFAbout 2 volts.In this way, can be each blue with inference
The forward operation voltage of light-emitting diode tube core is about 37.2 volts (=3.1V*12), and each red light-emitting diode pipe
The forward operation voltage of core is about 12 volts (=2V*6).If it is intended to the correlated colour temperature T reachedNFor 4000 ° of K, according to Fig. 5,
Power ratio RWShould be between 7.015 to 4.353.Therefore, as long as 5 blue light-emitting diode tube cores, 3 feux rouges hairs of connecting
Optical diode tube core, caused power ratio RW5.16 (=37.2*5/ (12*3)), overall forward operation voltage will be approximately equal to
About 222V (=37.2*5+12*3), it is possible to about suitable for the bulb light application that electric main is 220 or 240ACV, reach
Correlated colour temperature is 4000 ° of K and has high CRI.
Although in embodiment in fig. 2, all LED units are all to be cascaded, of the invention and unlimited
In this.Fig. 6 display foundation an alternative embodiment of the invention, wherein, blue light-emitting diode unit 70 is cascaded, and is determined
Electric current 66 is driven；Red light-emitting diode unit 72 is cascaded, and is driven by constant current 68.Blue light-emitting diode list
Member 70 can be co-located on a package substrate with red light-emitting diode unit 72, by the plain conductor on package substrate or
It is bonding wire, reaches the structure of serial or parallel connection.Constant current 66 makes blue light-emitting diode unit 70 send out feux rouges with constant current 68
The power ratio R of optical diode unit 72W, the hatched example areas 64 in Fig. 5 is fallen into, can reach desirable opposite colour temperature and CRI.
Blue light-emitting diode unit 70 can all in a blue light-emitting diode tube core or divide in several blue light-emitting diode pipes
Core.Similar, red light-emitting diode unit 72 can all in a red light-emitting diode tube core or divide in several feux rouges
LED core.In the embodiment in fig 6, blue light-emitting diode unit 70 is equivalent with red light-emitting diode unit 72
It is in parallel.Because the electric current for flowing through blue light-emitting diode unit 70 is separate with the electric current of red light-emitting diode unit 72,
So as long as appropriate number of diodes and constant current size are selected, by power ratio RWAdjustment is in hatched example areas 62, you can
Up to desirable opposite colour temperature.
In one embodiment of this invention, blue light caused by blue light-emitting diode tube core (the first light) and fluorescence
Bisque produces green-yellow light (the third light), mixes a white light.The white-light emitting efficiency EF of white lightWBetween every watt of 100 lumens
To between 200 lumens, and the red light-emitting efficiency EF for the feux rouges (second of light) that each red light-emitting diode tube core is sentRIt is situated between
In every watt of 100 lumens between 200 lumens, and the package substrate temperature of white light LEDs is operated between 60 degree of C to 100 degree of C.
In one embodiment, red light-emitting efficiency EFRAnd white-light emitting efficiency EFWIt is all higher than every watt of 100 lumens.
In one embodiment of this invention, for change blue light that a blue light-emitting diode tube core sent into yellow light or
The phosphor powder layer of green-yellow light, fluorescent powder therein include by Mg, Ca, Ba, Sr, Zn, Pr, Nd, Dy, Er, Ho, Y, Ce, Al institute
At least one in the groups of elements of composition.Phosphor powder layer can only have a kind of phosphor material powder of chemical composition, also may be used
To there is the phosphor material powder of the different chemical compositions of two kinds or the above.
Blue light-emitting diode tube core 20 in Fig. 3 and red light-emitting diode tube core 22 be copline be fixed on encapsulation
On substrate 12, however, the present invention is not limited thereto.In the embodiment of Fig. 7, blue light-emitting diode tube core 20 and two pole of red light-emitting
Pipe tube core 22 is arranged in different planes, and red light-emitting diode tube core 22 is more than blue light relative to the distance of package substrate
LED core 20 relative to package substrate distance.Suitably arrange blue light-emitting diode tube core 20 and red light-emitting
Position of the diode chip 22 on package substrate, thus it is possible to vary the light shape of whole light-emitting device.
LED core in the embodiment of the present invention is also not necessarily limited to the only optical lens in Fig. 3.Another
There can be several optical lenses according to the embodiment of the present invention, one to one on LED core, such as Fig. 8 institutes
Show.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to the claims in the present invention are with repairing
Decorations, should all belong to the covering scope of the present invention.
Claims (9)
1. a kind of light-emitting device, it includes have：
First LED core, can send the first light；
Second LED core, can send second of light；And
Electric connection structure, to be electrically connected first LED core and second LED core；
Wherein, first LED core and second LED core consume the first electrical power W respectivelyBAnd
Second electrical power WR, and the correlated colour temperature of the light-emitting device is TN；
First electrical power WBTo second electrical power WRPower ratio be RW；And
Power ratio RWBetween 7.67*ln (TN) -56.6 arrive 5.01*ln (TN) between -37.2.
2. light-emitting device as claimed in claim 1, wherein, which is blue light or ultraviolet.
3. light-emitting device as claimed in claim 1, also comprising a phosphor powder layer, is optically coupled to first light emitting diode
Tube core, can be excited by the first light, and send the third light.
4. light-emitting device as claimed in claim 3, wherein, the phosphor powder layer be located at first LED core with this
On two LED cores.
5. light-emitting device as claimed in claim 3, wherein, which is located on first LED core, but
Without position on second LED core.
6. light-emitting device as claimed in claim 3, wherein, which includes the fluorescence of at least two different chemical compositions
Powder material.
7. light-emitting device as claimed in claim 3, wherein, if it is white light that the first light is mixed with the third light, this
The luminous efficiency of two kinds of light and the luminous efficiency of the white light are all higher than 100 lumens/watts.
8. light-emitting device as claimed in claim 1, further comprises package substrate, wherein, the first light emitting diode pipe
Core is fixed on the package substrate with the second LED core copline.
9. light-emitting device as claimed in claim 1, further comprises package substrate, wherein first LED core
It is not fixed on copline on the package substrate with second LED core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210475615.0A CN103839511B (en) | 2012-11-21 | 2012-11-21 | Light-emitting device and driving method on light emitting diode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210475615.0A CN103839511B (en) | 2012-11-21 | 2012-11-21 | Light-emitting device and driving method on light emitting diode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103839511A CN103839511A (en) | 2014-06-04 |
| CN103839511B true CN103839511B (en) | 2018-05-11 |
Family
ID=50802956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210475615.0A Active CN103839511B (en) | 2012-11-21 | 2012-11-21 | Light-emitting device and driving method on light emitting diode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103839511B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015198699A1 (en) * | 2014-06-26 | 2015-12-30 | Ｎｅｃライティング株式会社 | Organic el panel control device, light source device, organic el panel control method, program, and recording medium |
| TWI621282B (en) * | 2014-09-11 | 2018-04-11 | 晶元光電股份有限公司 | Light-emitting diode device with fluorine-containing phosphor composition |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7221044B2 (en) * | 2005-01-21 | 2007-05-22 | Ac Led Lighting, L.L.C. | Heterogeneous integrated high voltage DC/AC light emitter |
| CN201069057Y (en) * | 2007-02-16 | 2008-06-04 | 厦门通士达照明有限公司 | High light efficiency high coloration LED lamp |
| CN101800219A (en) * | 2009-02-09 | 2010-08-11 | 晶元光电股份有限公司 | Luminescent element |
| CN102374496A (en) * | 2010-08-18 | 2012-03-14 | 晶元光电股份有限公司 | Multidimensional lighting device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008127460A2 (en) * | 2006-12-08 | 2008-10-23 | Evident Technologies | Light-emitting device having semiconductor nanocrystal complexes |
-
2012
- 2012-11-21 CN CN201210475615.0A patent/CN103839511B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7221044B2 (en) * | 2005-01-21 | 2007-05-22 | Ac Led Lighting, L.L.C. | Heterogeneous integrated high voltage DC/AC light emitter |
| CN201069057Y (en) * | 2007-02-16 | 2008-06-04 | 厦门通士达照明有限公司 | High light efficiency high coloration LED lamp |
| CN101800219A (en) * | 2009-02-09 | 2010-08-11 | 晶元光电股份有限公司 | Luminescent element |
| CN102374496A (en) * | 2010-08-18 | 2012-03-14 | 晶元光电股份有限公司 | Multidimensional lighting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103839511A (en) | 2014-06-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103828487B (en) | Have and can select and/or the light emitting semiconductor device of adjustable color dot and associated method | |
| US8963168B1 (en) | LED lamp using blue and cyan LEDs and a phosphor | |
| JP6140742B2 (en) | White light electroluminescent device with adjustable color temperature | |
| CN108305929B (en) | White light emitting device with high color rendering | |
| EP3553835B1 (en) | Semiconductor light emitting devices comprising recipient luminophoric mediums having narrow-spectrum luminescent materials | |
| CN107004751B (en) | Light emitting device and luminaire | |
| US8450748B2 (en) | Solid state light emitting device | |
| US10541353B2 (en) | Light emitting devices including narrowband converters for outdoor lighting applications | |
| US20090114932A1 (en) | Light Source and Method of Controlling Light Spectrum of an LED Light Engine | |
| KR20140097284A (en) | High voltage array light emitting diode(led) devices, fixtures and methods | |
| US20130015461A1 (en) | Light-emitting Device Capable of Producing White Light And Light Mixing Method For Producing White Light With Same | |
| Lin et al. | Excellent color quality of white-light-emitting diodes by embedding quantum dots in polymers material | |
| CN106783821A (en) | The full-spectrum LED encapsulating structure and its method for packing of a kind of unstressed configuration powder | |
| CN103839511B (en) | Light-emitting device and driving method on light emitting diode | |
| CN102779814A (en) | Light emitting element capable of giving out white light and light mixing method of light emitting element | |
| CN107431117A (en) | Light-emitting device | |
| CN102374496B (en) | Multidimensional lighting device | |
| KR20130027740A (en) | Lighting device and lighting control method | |
| CN206401317U (en) | A kind of full-spectrum LED encapsulating structure of unstressed configuration powder | |
| TWI564854B (en) | Lighting apparatuses and driving methods regarding to light-emitting diodes | |
| CN207134360U (en) | Light emitting diode light emitting layer structure capable of generating different light emitting colors on single wafer | |
| KR20110124196A (en) | Warm white light emitting apparatus and back light module comprising the same | |
| KR20130027741A (en) | Lighting device and lighting control method | |
| Yan et al. | CQD-LEDs with High Colour Rendering Index | |
| TWI506759B (en) | A light emitting element capable of emitting white light and a method of mixing the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |